165 results about "Corrosion reaction" patented technology

The invention relates to a self-repairing anti-corrosion water-based paint applied to the field of paint compositions, which is prepared by the following steps: firstly, preparing a self-repairing microcapsule encapsulated with a self-repairing agent and a corrosion inhibitor, and then uniformly dispersing the self-repairing microcapsule into water-based base resin under a low-shear condition; the prepared coating can be applied to the surface of a pretreated metal base material in a brush coating, spray coating or blade coating mode and the like, a micron-sized anti-corrosion coating is formed after curing, under the normal condition, the microcapsules are placed in the coating in a standing mode and do not work, when scratches occur, the self-repairing microcapsules are broken and play a role, and the corrosion resistance of the coating is improved. The self-repairing agent rapidly fills and heals the damaged part of the coating to form a new barrier layer, the corrosion inhibitor forms a protective film on the exposed metal surface to inhibit the corrosion reaction, and the synergistic mechanism can effectively delay the corrosion diffusion of the scratched part, so that the protection integrity of the coating on the base material is maintained, and the service life of the coating is prolonged. And the coating can be suitable for metal structure protection in severe environments such as ocean climate, high-humidity and high-salt environments, acid rain regions, chemical environments and the like.

The invention discloses a method for synthesizing methylal through acetalation by using a strongly acidic composite metal oxide, and particularly relates to preparation of a strongly acidic composite metal oxide catalyst and a method for preparing methylal through condensation of methanol and formaldehyde by using the strongly acidic composite metal oxide catalyst. The preparation method comprises the following steps: preparing a ZrO2-SiO2 composite oxide precursor by adopting a coprecipitation method, dipping and loading active metal and an auxiliary agent on the composite oxide precursor, and applying the active metal and the auxiliary agent to a process of preparing methylal through acetalation. The method has the advantages of simple synthesis, no corrosion to equipment, mild reaction conditions, capability of improving the activity and stability of the catalyst, and the like.

The invention discloses a method for controlling CMP (chemical mechanical polishing) dish-shaped pits, corrosion pits and interface corrosion of ruthenium barrier layer copper wiring, which is suitable for a manufacturing process of integrated circuits of 14 nanometers and below. According to the method, a specifically synthesized TTAK corrosion inhibitor is introduced into a polishing solution system, the oriented adsorption characteristic of the molecular structure of the TTAK corrosion inhibitor is utilized, the corrosion reaction of copper is selectively inhibited, meanwhile, the normal material removal efficiency of a ruthenium barrier layer and a TEOS dielectric layer is maintained, and cooperative regulation and control of the removal rate of the Cu / Ru / TEOS material are achieved. By means of the method, dished pits, corrosion pits and Fang type interface defects generated in the fine polishing and barrier layer polishing process can be effectively eliminated, and copper / ruthenium interface corrosion is improved. According to the method, the global planarization quality of the copper interconnection ruthenium barrier layer is remarkably improved, the interface bonding strength and the electrical reliability of an interconnection circuit are enhanced, and an effective solution is provided for performance optimization of an advanced process integrated circuit device.

The invention relates to a material corrosion testing system based on a high-temperature ammonia decomposition complex environment. The material corrosion testing system comprises a corrosion medium configuration mechanism, a corrosion environment control mechanism and a corrosion reaction mechanism, the corrosive medium configuration system comprises a gas cylinder, a gas pressure stabilizing device and a feeding device which are connected in sequence; the corrosion environment control system is a control operation box; the control operation box is connected with the gas pressure stabilizing device and the feeding device; the corrosion reaction mechanism comprises a stress stretching device, a high-temperature ammonia decomposition stress corrosion device and a high-temperature ammonia decomposition chemical corrosion device which are separately arranged, and an ammonia tail gas treatment device; the high-temperature ammonia decomposition stress corrosion device and the high-temperature ammonia decomposition chemical corrosion device are simultaneously connected with the feeding device and the ammonia tail gas treatment device; the material corrosion test system based on the high-temperature ammonia decomposition complex environment can adjust components, temperature, pressure and flow velocity of a corrosion medium according to requirements, and stress and chemical corrosion test and evaluation of various samples are realized at the same time.

The invention discloses a method and device for establishing an oxidation corrosion model of ferrochrome in a closed environment based on finite elements, and the method comprises the steps: obtaining a first size of a closed gas environment, and obtaining a second size of a sample of a ferrochrome material; establishing a two-dimensional geometric model according to the first size and the second size; the oxidation corrosion reaction information of the ferrochrome material is preset; presetting a first attribute of the ferrochrome alloy material, a second attribute of a reaction substance and a third attribute of a closed gas environment; performing grid division on the ferrochrome material to obtain a target grid division area; and constructing an oxidation corrosion model according to the two-dimensional geometric model, the oxidation corrosion reaction information, the first attribute, the second attribute, the third attribute and the target grid division region. The method can improve the data accuracy of monitoring and predicting the corrosion degree of the alloy, and can be widely applied to the technical field of computers.

The invention provides a perovskite solar cell and a preparation method thereof. The perovskite solar cell comprises a transparent substrate layer, a hole transport layer or an electron transport layer, a perovskite active layer, a hole transport layer or an electron transport layer and a composite electrode layer which are sequentially arranged from bottom to top, the composite electrode layer is of a double-layer composite structure composed of a first metal layer and a second metal layer, and the first metal layer is a molybdenum metal layer. The high chemical stability and compact structure of the molybdenum metal layer are utilized, a physical barrier is formed between the perovskite active layer and the second metal layer, migration of halogen ions such as iodine (I-) to the top electrode is effectively inhibited, direct corrosion reaction between the second metal layer and the halogen ions is avoided, and the stability of long-term operation of the device is remarkably improved.

The invention relates to a controllable pressure-temperature-impurity material corrosion testing device based on a liquid ammonia environment. The controllable pressure-temperature-impurity material corrosion testing device comprises an impurity-containing liquid ammonia environment preparation system, a high-low pressure transmitting system, a high-low temperature constant-temperature circulating system, a corrosion reaction system, a data monitoring and collecting system and a tail gas treatment system, the corrosion test device not only can realize preparation of a liquid ammonia environment containing multi-element impurities and meet corrosion environments under different pressure and different temperature conditions, but also can meet synchronous test of a plurality of samples and a plurality of corrosion modes, so that the test capability of the test device is greatly improved.

The invention discloses a post-processing method for improving a high-pressure impact damage threshold of a sapphire optical element, which comprises the following steps: exposing and passivating subsurface defects through high-temperature chemical corrosion reaction, and removing insoluble reaction sediments through phosphoric acid reaction at high temperature; afterwards, removing redundant acidic materials through a NaOH solution assisted by multi-frequency ultrasonic wave alternate multiplexing; and finally, rinsing through high-purity water and a surfactant assisted by multi-frequency ultrasonic wave alternate multiplexing. The sapphire optical element can be globally treated, a deposition layer is removed and scratches and pits in a subsurface layer are exposed through corrosion treatment of a mixed solution of sulfuric acid and phosphoric acid in a specific proportion at a high temperature and phosphoric acid dissolution, and sharp shapes in the scratches are effectively passivated, so that the sapphire high-pressure impact damage threshold value is effectively increased.

In order to solve the problems that in the prior art, a zinc negative electrode is prone to corrosion and zinc dendrite growth in the charging and discharging process, the zinc negative electrode comprises a negative electrode base material, a negative electrode active layer and a composite coating, the composite coating comprises a first coating and a second coating, the negative electrode active layer is arranged on the surface of the negative electrode base material, and the second coating is arranged on the surface of the negative electrode base material. The second coating is arranged on one surface, deviating from the negative substrate, of the negative active layer; the first coating is arranged on one surface, deviating from the negative active layer, of the second coating; the first coating comprises a first material, the second coating comprises a second material, the first material comprises an amide polymer and / or an amide non-polymer, and the second material comprises one or more of an ionic liquid material, a zinc phosphate material and a cerium oxide material. The surface of the zinc negative electrode is coated with the composite coating, so that multiple protection on the zinc negative electrode is formed, contact between zinc and electrolyte is effectively reduced, corrosion reaction and zinc dendrite growth are inhibited, and the cycle performance and safety of the nickel-zinc battery are improved.

The invention introduces a method for preparing artificial rutile by using reduced ilmenite, which comprises the following steps: S1, adding reduced ilmenite into a corrosion tank, introducing oxidizing gas to carry out corrosion reaction, and washing and separating the reaction product through a cyclone and a high-frequency sieve to obtain primary artificial rutile and hydrated iron oxide slurry; s2, carrying out filter pressing on the hydrated iron oxide slurry obtained in the step S1 by using a filter press, and preparing refined iron oxide from the obtained iron oxide slurry; s3, the primary artificial rutile obtained in the step S1 is washed and then subjected to a hydrochloric acid leaching reaction, a mixed material obtained after acid leaching enters a thickener, and supernatant returns to prepare an acid leaching solution; feeding lower-layer ore grains into a belt filter for deacidification and washing; and S4, drying the cleaned primary artificial rutile obtained in the step S3 through a drying cylinder to obtain the finished artificial rutile. Industrial hydrochloric acid is used as a rusting agent, and compared with ammonium chloride, the product Fe (OH) 3 can be separated more easily. Oxidizing gas used for rusting is mixed gas of air and pure oxygen, and the mixing proportion of the air and the pure oxygen can be dynamically adjusted according to different rusting raw materials, so that the reaction condition is in an optimal state. In the corrosion and acid leaching processes, the recycling efficiency of the liquid raw material is extremely high, and the prepared artificial rutile meets the requirements of a chlorination process titanium dioxide raw material. The whole process flow is reasonable in design, simple to operate, free of environmental pollution and easy for industrial production.

The invention discloses a metal stack cavity header tube region polar plate anti-corrosion structure and an applied stack thereof. The stack comprises a plurality of groups of stacked metal bipolar plates, wherein a corrosion sacrifice structure is arranged on the metal bipolar plate on the high-voltage side of a fuel cell stack close to the liquid outlet side of a circulation cavity in an extending manner along a second direction; according to the corrosion sacrifice structure, the overlapped edge area of the metal bipolar plate and the insulating sealing gasket can be subjected to electrochemical corrosion preferentially, corrosion of the interior of a galvanic pile to a polar plate material is reduced and avoided, a corrosion reaction can occur preferentially in a designed corrosion area, and on the premise that the material cost is not increased and the design compactness is not sacrificed, the service life of the galvanic pile is prolonged. The discharge area can be effectively increased, corrosion current can be intercepted in advance, the corrosion resistance of the metal bipolar plate is effectively improved, the highest potential and the reaction active area of the adjacent power generation unit are protected, and the service life of the fuel cell stack is remarkably prolonged.

The application provides high-strength spherical activated carbon and a preparation method thereof; on one hand, sulfuric acid and a promoter system are used, over-sulfuric acid (H2SO5) is generated by the reaction of the sulfuric acid and the promoter, the oxidizability of the system is significantly enhanced in a short time, and the system has certain acidity, so that the removal of -H is realized on the basis of protection of the main chain structure of a polymer; on the other hand, iron ions are added, the corrosion to a reaction container can be inhibited, the reaction condition is mild, the material requirement of the reaction container is relatively low, and meanwhile, the yield and the strength of the spherical activated carbon are improved.

The present invention provides a corrosion reaction box for complex and slender copper tube cores of aluminum alloy castings by flow corrosion, and relates to the technical field of corrosion reaction boxes. The corrosion reaction box for complex and slender copper tube cores of aluminum alloy castings by flow corrosion comprises a box body, the corners of the bottom of the box body are fixedly connected with universal wheels, the top of the box body is rotatably connected with a sealed box cover, the center of the front end of the sealed box cover is fixedly connected with a box opening handle, the center of the front end of the box body and the center of the top of the sealed box cover are both embedded with observation windows, a corrosion liquid circulation mechanism is installed on one side of the outer wall of the box body, the top of the center of the box body is fixedly connected with a rotating support mechanism, and the top of the rotating support mechanism is rotatably connected with an aluminum alloy casting positioning mechanism. By designing a flow-type corrosion processing structure, the copper tube core in the aluminum alloy casting can be rapidly corroded, which greatly accelerates the corrosion efficiency and does not cause corrosion damage to the aluminum alloy casting body.

The present application provides an electro-osmosis moisture-proof anode and a moisture-proof system, which belong to the field of electro-osmosis moisture-proof dehumidification technology. The electro-osmosis moisture-proof anode includes a main electrode and an auxiliary electrode; wherein the auxiliary electrode includes a first conductive coating and a second conductive coating; the first conductive coating is coated on the surface of the wall, the second conductive coating is coated on the surface of the first conductive coating, and the main electrode is clamped and fixed between the first conductive coating and the second conductive coating. With the electro-osmosis moisture-proof anode provided by the present application, during the specific installation and construction, it is only necessary to coat the conductive coating on the wall surface and clamp the main electrode between the two conductive coatings, which will not cause damage to the wall surface and has low construction difficulty. At the same time, the main electrode is not in direct contact with the wall, and no electrochemical corrosion reaction will occur. The service life is long and the equipment cost is low.

The invention provides a method for solving electrochemical corrosion of a water channel of a motor controller, which comprises the following steps of: adding an anticorrosive coating on a contact surface of a water channel of a main shell of an IGBT (Insulated Gate Bipolar Translator) plate of an electric vehicle, and treating an aluminum lower surface of the water channel of the main shell of the IGBT plate of the electric vehicle by adopting the methods of electroplating, anodic oxidation, chemical plating and supersonic cold spraying. The potential difference between the bottom of the copper-plated and nickel-plated IGBT above the water channel and aluminum materials on the fin column and the lower surface is reduced, so that the electrochemical corrosion reaction of the water channel of the main shell of the IGBT plate is reduced. According to the method, deposition caused by electrochemical corrosion reaction of the new energy automobile motor control water channel can be inhibited, smooth flowing of cooling liquid in the water channel is ensured, and an IGBT plate located above the water channel substrate is prevented from thermal stress damage to cause an over-temperature fault. According to the method, the IGBT plate is always in a comfortable working environment, the reliability of the IGBT plate is improved, the service life of the IGBT plate is prolonged, and the safety in the driving process is improved.

The utility model relates to the technical field of reaction kettles, and discloses a pressure-resistant anti-corrosion reaction kettle which comprises a reaction kettle body, a pressure-resistant ring is fixedly connected to the outer surface of the reaction kettle body, a support is fixedly connected to the outer surface of the pressure-resistant ring, reinforcing ribs are fixedly connected to the interior of the reaction kettle body, and the reinforcing ribs are fixedly connected to the outer surface of the support. The inner wall of the reaction kettle body is fixedly connected with a pressure-resistant layer. The reaction kettle has the following advantages and effects that the first corrosion-resistant layer performs corrosion-resistant protection on the inner wall of the reaction kettle body, and the second corrosion-resistant layer performs corrosion-resistant protection on the surface of the reaction kettle body, so that the inside and the outside of the reaction kettle body have a corrosion-resistant effect, corrosion of high-acid-base materials is avoided, the wear-resistant layer prevents the inner wall from being worn, and the service life of the reaction kettle is prolonged. The acid and alkali resistant layer can resist acid and alkali erosion, and meanwhile, under the action of the heat preservation layer, the first corrosion resistant layer and the second corrosion resistant layer have a heat preservation effect, so that materials in the reaction kettle body are prevented from being influenced by temperature, protection is more comprehensive and diversified, and the service life of the reaction kettle body is prolonged.

The invention discloses a galvanic corrosion test system for simulating a high-temperature steam-water environment. The galvanic corrosion test system comprises an experiment barrel, a dissolved oxygen monitoring unit and a temperature, pH and conductivity monitoring unit, a barrel cover is mounted at the top of the experiment barrel, a working electrode clamp is mounted in the experiment barrel, a working electrode groove is formed in the working electrode clamp, a working electrode is mounted in the working electrode groove, and a galvanic corrosion reaction is carried out in the experiment barrel; the dissolved oxygen monitoring unit comprises an oxygen conveying pipe connected to the experiment barrel, and oxygen is input into the experiment barrel through the oxygen conveying pipe, so that the dissolved oxygen amount of the electrolyte is increased; the device further comprises a dissolved oxygen monitor, the electrolyte in the experiment barrel is input into the dissolved oxygen monitor to monitor the dissolved oxygen amount in real time, and the electrolyte in the dissolved oxygen monitor is monitored and then flows back into the experiment barrel. The temperature, pH and conductivity monitoring unit comprises a temperature sensing electrode, a pH sensing electrode and a conductivity sensing electrode which are connected to the experiment barrel and are respectively used for monitoring the temperature value, the pH value and the conductivity value of the electrolyte.

The utility model provides a clothes recycling box with a hidden door lock, and relates to the technical field of clothes recycling boxes with hidden door locks, the clothes recycling box comprises a box body, a clothes placing door is rotatably connected to the box body, a clothes taking door is hinged to the box body, a lock body is fixedly connected to the clothes taking door, a collecting box is arranged in the box body, and the lock body is fixedly connected to the collecting box. A protective structure is arranged on the clothes taking door, the protective structure is mainly composed of two sliding ways, the two sliding ways are both fixedly connected to the clothes taking door, a protective plate is jointly connected to the two sliding ways in a sliding mode, a sealing ring is fixedly connected to the clothes taking door, a sealing groove is formed in the protective plate, and the sealing ring is fixedly connected to the clothes taking door. The utility model solves the problems that the existing clothes recycling box is mostly directly placed outdoors, and the lock body on the clothes box can accelerate the water accumulation on the surface of the lock body in a high-humidity environment and promote the corrosion reaction, especially in a rainy day, the corrosion is easily caused.

The present invention discloses a method for enhancing methane production and carbon sequestration in anaerobic digestion by zero-valent iron in cooperation with exogenous CO2. The method includes: inoculating sludge in a reactor, adding zero-valent iron thereto, and then adding wastewater. The reaction temperature is maintained at 35 ± 1 °C, and CO2 is injected into the liquid surface at a flow rate of 1.5 L / min for 5 - 50 min / L under stirring. CO2 and zero-valent iron jointly regulate the pH of the system, providing a suitable anaerobic digestion environment for microorganisms. Through the corrosion reaction of zero-valent iron under anaerobic conditions, electrons are released and H2 is generated, stimulating the proliferation of hydrogen-consuming microorganisms, while improving the activity of microorganisms and enzymes, increasing the methane production and rate. In addition, some methanogens in the system utilize H2 and CO2 to produce amorphous carbon, and zero-valent iron and exogenous CO2 are used to regulate the growth of amorphous carbon, strengthening the fixation of CO2 in the system.

The invention relates to the technical field of metal surface treatment process auxiliary equipment, and discloses a method for prolonging the service life of a loading hanger for a special polishing and washing process, which comprises the following steps: S1, a spray gun nozzle is matched with carborundum to carry out sand blasting treatment on the hanger; s2, an alkali washing degreasing agent is matched with ultrasonic power cleaning equipment for cleaning; s3, the hanging tool is put into an oven to be heated step by step, and a Teflon powder material is evenly sprayed and attached to the surface of the hanging tool from top to bottom through a spray gun; s4, after spraying is completed, the hanging tool is moved into a constant-temperature oven, the temperature is set, constant-temperature curing is conducted, and then heating is stopped till the hanging tool is naturally cooled to the normal temperature; the titanium alloy hanger base body and the Teflon protection layer are used in cooperation, hydrofluoric acid corrosion resistance and high temperature resistance of Teflon are utilized, a compact protection film is formed on the surface of the hanger, and passive film damage and metal corrosion reaction are avoided; and meanwhile, the binding force of the protective layer and the base body is improved through the sand blasting roughening process, and the service life of the hanger is prolonged.

The utility model discloses an electrochemical test experimental device for boiling nitric acid corrosion in a high-temperature reduced-pressure environment, which relates to the technical field of electrochemical test and consists of a reduced-pressure boiling corrosion reaction system, an electrochemical test system, a heating system, an acid gas absorbing and drying system, a vacuum degree control system and an automatic integrated control system. The decompression boiling corrosion reaction system is connected with the acid gas absorption and drying system, the vacuum degree control system and the heating system are respectively connected with the acid gas absorption and drying system and are in contact with the decompression boiling corrosion reaction system, and an automatic integrated control system is adopted to control the experimental device. The experimental device disclosed by the utility model can test and simulate the electrochemical corrosion behavior of high-temperature reduced-pressure boiling nitric acid in the environment of the evaporator for spent fuel post-treatment, and can realize weight loss and electrochemical test of various materials under the condition of reduced-pressure boiling strong corrosive solution at the same time.

This invention discloses a high-temperature liquid sodium-metal oxidation corrosion experimental system, relating to the field of corrosion resistance testing devices. It includes an experimental body, a gas path system, a heating coil, multiple thermocouples, a controller, and a DC power supply. The experimental body comprises a pressure-holding container, multiple independent sample containers, and a positioning disk. Each sample container consists of hollow bolts, nuts, annular gaskets, and a wire mesh wick. The metal sample is placed on the wire mesh wick. The gas path system is connected to the pressure-holding container. The heating coil is wound around the outer surface of the pressure-holding container, and the thermocouples are inserted into the pressure-holding container. The controller is connected to both the thermocouples and the DC power supply, which is also connected to the heating coil. The wire mesh wick, metal samples, and sample containers are made of the same material, thus avoiding interference with the corrosion reaction of the metal samples. The sample containers are independent, and different metal samples do not affect each other. Combining different oxygen contents, metal samples, and wire mesh wick mesh sizes allows for the acquisition of richer experimental data in a single operation.

The invention relates to the technical field of water electrolysis hydrogen production, in particular to an oxygen evolution catalyst and a preparation method and application thereof. The preparation method of the oxygen evolution catalyst comprises the following steps: dissolving metal salt in deionized water to prepare a precursor metal solution; immersing the foam metal substrate into the precursor metal solution, carrying out corrosion reaction in an oxygen-containing atmosphere, forming a nickel-cobalt-iron layered hydroxide nanosheet on the foam metal substrate, and preparing an oxygen evolution catalyst; wherein the metal salt comprises two of nickel salt, cobalt salt and iron salt; the foam metal substrate comprises one of a foam nickel substrate, a foam cobalt substrate and a foam iron substrate; metal elements contained in the metal salt are different from metal elements contained in the foam metal substrate. The preparation method of the oxygen evolution catalyst provided by the invention is simple in process and low in raw material cost, and the prepared oxygen evolution catalyst has relatively high oxygen evolution reaction activity and stability.

The present invention relates to the technical field of oilfield power grids, and in particular to an anti-electrical corrosion testing device for ADSS optical cables of oilfield power grids, which solves the problem of being unable to understand the anti-electrical corrosion performance of optical cables, resulting in a short service life. The device comprises a detector, wherein a cable groove is provided inside the detector, an optical cable is installed inside the cable groove, an immersion mechanism is installed inside the detector, fixing mechanisms are symmetrically installed at both ends of the detector, and a detection mechanism is installed on the front of the detector. The device sets contacts to contact the surface of the optical cable, so that an electromagnet generates magnetism, and the magnetism is the same as that of a magnetic block, so that the magnetic block moves under the action of the electromagnet, and then drives a rotating ring to rotate, so that a pointer points to a scale line on the inner wall of a dial after the rotating ring rotates, thereby indicating the size and start time of the electric corrosion reaction on the optical cable at this time, thereby indirectly reflecting the anti-electrical corrosion strength of the optical cable, and facilitating the selection of optical cables by staff.

The invention discloses a preparation method and application of a zinc negative electrode of a pre-corrosion in-situ modified water-based zinc ion battery, and provides the water-based zinc ion battery at the same time. The zinc negative electrode of the pre-corrosion modified aqueous zinc ion battery is one of a pre-corrosion in-situ zinc tungstate composite zinc electrode (ZnWO), a pre-corrosion in-situ zinc molybdate composite zinc electrode (ZnMoO), a pre-corrosion in-situ zinc vanadate composite zinc electrode (ZnVO) and a pre-corrosion in-situ zinc silicate composite zinc electrode (ZnSiO). The application of the corrosion reaction on the surface of the metal zinc negative electrode is discussed for the first time, the corrosion reaction on the surface of zinc is utilized to form the corresponding compact, multifunctional, stable and insoluble pre-corrosion in-situ zinc salt composite zinc electrode, various side reactions are relieved, uniform zinc deposition is guaranteed, the zinc is not prone to falling off in the repeated zinc deposition stripping process, and the service life of the zinc electrode is prolonged. And finally, stable and long-acting application of the aqueous zinc ion battery is realized.

This application discloses an electrode structure, a battery cell, and a battery. The electrode structure includes a current collector, a first coating layer, and a second coating layer. Along the thickness direction of the current collector, the first coating layer is disposed on at least one side of the current collector; and along the thickness direction of the current collector, the second coating layer and the first coating layer are located on the same side. Along the width direction of the current collector, the second coating layer is disposed on at least one side of the first coating layer. The static voltage of the second coating layer is lower than the static voltage of the first coating layer. In the electrode structure of this application embodiment, the static voltage of the second coating layer is lower than the static voltage of the first coating layer, thus reducing the oxidation potential at the interface between the active material and the tab, reducing the oxidation potential at the interface between the active material and the tab (enriched electrolyte), thereby greatly reducing the corrosion reaction rate, reducing the risk of corrosion fracture at the interface between the positive electrode active material and the tab, and improving the cycle performance of the battery.

The present invention relates to a material corrosion testing system based on a complex environment of high-temperature ammonia decomposition, comprising a corrosive medium configuration mechanism, a corrosive environment control mechanism and a corrosive reaction mechanism; the corrosive medium configuration system comprises a gas cylinder, a gas pressure stabilizing device and a feeding device connected in sequence; the corrosive environment control system is a control operation box, which is connected to the gas pressure stabilizing device and the feeding device; the corrosive reaction mechanism comprises a stress stretching device, a high-temperature ammonia decomposition stress corrosion device and a high-temperature ammonia decomposition chemical corrosion device which are separately arranged, and an ammonia tail gas treatment device; the high-temperature ammonia decomposition stress corrosion device and the high-temperature ammonia decomposition chemical corrosion device are simultaneously connected to the feeding device and the ammonia tail gas treatment device; the material corrosion testing system based on a complex environment of high-temperature ammonia decomposition can adjust the corrosive medium component, corrosive medium temperature, corrosive medium pressure and corrosive medium flow rate according to demand, and simultaneously realize stress and chemical corrosion testing and evaluation of multiple samples.

The application discloses a kind of theoretical model for evaluating pipeline steel macro-battery corrosion under elastic-plastic deformation, the theoretical model includes following physical field and coupling mechanism thereof: physical field: (1) stress-strain field: the elastic-plastic mechanics constitutive model based on von Mises yield criterion and isotropic hardening criterion is used to characterize the mechanical behavior of pipeline steel;(2) electrochemical field: the electrode kinetics model based on Tafel equation is used to characterize the corrosion reaction kinetics process on the surface of pipeline steel;Coupling mechanism: the mechanical-electrochemical double-path coupling mechanism for characterizing macro-battery corrosion.The model realizes the quantitative description of the macro-battery corrosion behavior induced by elastic-plastic deformation by coupling the mechanical deformation and electrochemical corrosion process of the material.The application realizes the two-way interaction of stress-strain field and electrochemical field under the background of macro-battery corrosion, and can quantitatively reveal the regulation of deformation on the intensity and evolution process of macro-battery corrosion.

This disclosure provides a solar cell, a semi-finished cell, and a fabrication method thereof, belonging to the field of solar cell technology. The semi-finished cell includes a cell body and a porous silicon layer serving as a texturing precursor. The porous silicon layer is disposed at least on the front surface of the cell body, with a porosity of 30%–70% and an average pore depth of 50 nm–500 nm. By preparing a porous silicon layer at least on the front surface of the cell body, this disclosure provides numerous and uniform nucleation sites for subsequent alkaline texturing. In an alkaline solution, the corrosion reaction preferentially begins from the pore edges, guiding the uniform and dense growth of the pyramid texture. Furthermore, the porous silicon layer serves as an effective anti-reflection structure, forming a dual anti-reflection effect with the subsequently formed pyramid textured surface, reducing reflection. In addition, the uniform textured surface further formed from the porous silicon layer has lower surface recombination, which is beneficial for improving minority carrier lifetime and increasing cell efficiency.

The invention relates to a self-repairing anticorrosive coating, a preparation method thereof, a photovoltaic module and a frame thereof. According to the self-repairing anticorrosive paint and the preparation method thereof, a specific amount of the solvent, the repairing agent nanometer container and the curing agent are added into the film-forming resin, the repairing agent is a heterocyclic compound capable of being subjected to coordination reaction with metal ions, heteroatoms of the heterocyclic compound comprise at least one of N, S and O, the nanometer container serves as a carrier of the repairing agent, and the curing agent is a curing agent. When corrosive media such as water molecules permeate into the surface of the frame to cause local corrosion, the repairing agent diffuses out of the nanometer container at the invasion position of the corrosive media and is subjected to coordination reaction with metal ions generated by corrosion reaction to form a new local protection film, and further diffusion of corrosion is limited. In addition, migration of metal ions can be well limited through the coordination effect, and then the effect of controlling PID effect deterioration is achieved. Therefore, the stability and the long-term effect of the frame and the assembly in severe environments such as high humidity and high salt can be improved.